Feb. 6, 2012 - 2010 Tour de France Winner Alberto Contador Found Guilty of Doping and Stripped of Title
- 776 BC - 393 BC - Ancient Greeks Use Performance Enhancing Drugs
- 100 AD - Roman Gladiators Use Stimulants and Hallucinogens to Prevent Fatigue and Injury
- Late 19th Century - French Cyclists and Lacrosse Players Drink Wine and Coca Leaves to Fight Fatigue and Hunger
- 1904-1920 - Performance Enhancing Drugs Used in the Modern Olympic Games
- 1928 - First Rule Against Doping in Sports
- 1940-1945 - Nazis Test Steroids on Prisoners and Hitler
- 1940-1945 - Soldiers Use Amphetamines During WWII
- 1950s - Athletes Begin Taking Amphetamines Used by Soldiers in WWII
- 1958 - FDA Approves First Anabolic Steroid for Sale in US
- Aug. 26, 1960 - First Athlete to Die in Olympic Competition Due to Doping
- July 13, 1967 - Cyclist on Amphetamines Is First Tour de France Doping Death
- 1967 - International Olympic Commitee (IOC) Establishes Medical Commission to Fight Doping
- Feb. 1968 - First Drug Testing at Olympic Games
- May 4, 1968 - First Horse Disqualified from Kentucky Derby for Banned Substance
- Oct. 1968 - First Olympic Athlete Disqualified for Doping Violation
- 1972 - First Full-Scale Drug Testing of Olympic Athletes for Narcotics and Stimulants
- 1975 - Anabolic Steroids Added to IOC's Banned Substances List
- 1976 - Steroid Testing Conducted for the First Time at the Montreal Olympics
- 1983 - Surprise Drug Testing at Pan Am Games Leads Many Athletes to Withdraw from Competition
- Sep. 27, 1988 - Ben Johnson Stripped of Gold Medal after Positive Drug Test
- Nov. 18, 1988 - President Reagan Signs Act Outlawing Non-Medical Steroid Sales
- Oct. 5, 1990 - Congress Passes Anabolic Steroids Control Act
- June 7, 1991 - Major League Baseball Bans Steroids
- Dec. 2, 1991 - Former East German Swimming Coaches Admit to Two Decades of Doping
- May 14, 1992 - Former NFL Player Dies of Brain Cancer after Using Steroids and HGH for Two Decades
- Sep.-Oct. 1994 - Chinese Swimmers Fail Drug Tests Three Times More Than Any Other Nation
- Dec. 15, 1994 - First British Female to Test Positive for PEDs Receives Four Year Ban
- 1998 - Irish Swimmer Suspended for Pouring Whiskey into Urine Sample to Mask Doping
- 1998 - Mark McGwire Admits to Using a Steroid Precursor
- Nov. 10, 1999 - World Anti-Doping Agency (WADA) Is Established
- Oct. 1, 2000 - US Anti-Doping Agency (USADA) Begins Operations
- 2002 - Anti-Doping Pioneer Identifies First Designer Steroid
- May 28, 2002 - Former Baseball Player Says 50% of MLB Players Use Steroids
- Aug. 30, 2002 - Steroid Testing Included in MLB Labor Agreement
- Apr. 21, 2003 - Wade Exum Report Alleges Cover-Up of Doping by Over 100 American Athletes
- Nov. 7, 2003 - British Sprinter Dwain Chambers Banned from Olympics for Life for Positive THG Test
- Nov. 13, 2003 - High Number of Positive Tests Leads MLB to Institute Penalties for Doping
- Dec. 2003 - 10 Baseball Players, including Barry Bonds, Called to Testify about BALCO
- Oct. 22, 2004 - President Bush Signs the Anabolic Steroid Control Act
- Jan. 13, 2005 - Penalties for Positive Drug Tests Implemented by Major League Baseball
- Jan. 19, 2006 - First NHL Player to Test Positive for Banned Substance Suspended from International Competition But Not from NHL
- Feb. 9, 2006 - US Skeleton Racer Banned for Use of Hair Growth Medicine on the Eve of the Winter Olympics
- Dec. 29, 2006 - President Bush Signs a Law Banning Gene Doping in Sports
- July 23, 2006 - Sep. 20, 2007 - Floyd Landis Wins the Tour de France But Loses Title When He Tests Positive for Elevated Testosterone Levels
- Jan. 24, 2007 - NFL Announces Stricter Anti-Doping Policies
- June 25, 2007 - WWE Wrestler Commits Murder/Suicide after Injecting Steroids
- Aug. 7, 2007 - Barry Bonds Hits Record 756th Home Run Amid Speculation of Steroid Use
- Sep. 24, 2007 - DEA Announces Largest Steroid Bust in US History
- Oct. 5, 2007 - Track Star Marion Jones Admits to Steroid Use During 2000 Olympics
- Nov. 1, 2007 - German Athletes and Their Children Suffer Health Problems 40 Years after Doping
- Nov. 15, 2007 - Barry Bonds Indicted by Grand Jury for Lying about Steroid Use
- Dec. 13, 2007 - Former Senator George Mitchell Reports Widespread Use of Steroids in Baseball
- Jan. 11, 2008 - Track Star Marion Jones Sentenced to Six Months in Prison
- Apr. 10, 2008 - IOC Rules Teammates of Marion Jones Must Return Olympic Medals
- July 31, 2008 - Seven Russians Caught Doping Prior to Beijing Olympics
- Sep. 5, 2008 - Steroids Banned at the Kentucky Derby
- Oct. 16, 2008 - First Doping Suspensions in History of Major League Soccer
- Dec. 2, 2008 - Six NFL Players Suspended for Taking Steroid Masking Agent
- Feb. 7, 2009 - NY Yankees' Third Baseman Alex Rodriguez Reportedly Tested Positive for Steroids in 2003
- Mar. 24, 2009 - Soccer Federations Reject WADA's Stricter Drug Testing Policies
- Apr. 17, 2009 - US Cyclist Tyler Hamilton Announces His Retirement After Testing Positive for Steroid DHEA
- May 2, 2009 - Winner of the Kentucky Derby Is Tested for Steroids for the First Time
- May 7, 2009 - LA Dodger Manny Ramirez Suspended for 50 Games
- July 30, 2009 - Two Players from the Red Sox 2004 and 2007 World Series Teams Tested Positive for Performance Enhancing Drugs in 2003
- Aug. 6, 2009 - NBA Player Rashard Lewis Receives 10 Game Suspension for Banned Substance
- Jan. 11, 2010 - Mark McGwire Admits to Using Steroids During His Baseball Career
- May 19, 2010 - Floyd Landis Admits to Doping for Most of His Career
- Aug. 19, 2010 - Roger Clemens Indicted on Charges of Lying to Congress about Using Performance Enhancing Drugs
- Mar. 21, 2011 - Barry Bonds Found Guilty on One Count of Obstruction of Justice in Steroids and HGH Case
- Aug. 4, 2011 - NFL to Become First Major American Sports League to Conduct Blood Tests
- Aug. 18, 2011 - First Professional Athlete in the US to Test Positive for HGH Is Suspended for 50 Games
- Feb. 3, 2012 - Two-Year Doping Investigation of Cyclist Lance Armstrong Ends with No Charges
- Feb. 6, 2012 - 2010 Tour de France Winner Alberto Contador Found Guilty of Doping and Stripped of Title
- Feb. 23, 2012 - Ryan Braun Becomes First Professional Baseball Player to Successfully Appeal a Positive Drug Test
- Aug. 23, 2012 - Lance Armstrong Stripped of His Seven Tour de France Titles After Declining to Fight Doping Charges
- Aug. 5, 2013 - Alex Rodriguez Suspended through 2014; 12 Players Suspended 50 Games for Violating MLB Drug Policy